1/*	$OpenBSD: fld_max.c,v 1.7 2023/10/17 09:52:10 nicm Exp $	*/
2/****************************************************************************
3 * Copyright 2019-2020,2021 Thomas E. Dickey                                *
4 * Copyright 1998-2012,2013 Free Software Foundation, Inc.                  *
5 *                                                                          *
6 * Permission is hereby granted, free of charge, to any person obtaining a  *
7 * copy of this software and associated documentation files (the            *
8 * "Software"), to deal in the Software without restriction, including      *
9 * without limitation the rights to use, copy, modify, merge, publish,      *
10 * distribute, distribute with modifications, sublicense, and/or sell       *
11 * copies of the Software, and to permit persons to whom the Software is    *
12 * furnished to do so, subject to the following conditions:                 *
13 *                                                                          *
14 * The above copyright notice and this permission notice shall be included  *
15 * in all copies or substantial portions of the Software.                   *
16 *                                                                          *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
24 *                                                                          *
25 * Except as contained in this notice, the name(s) of the above copyright   *
26 * holders shall not be used in advertising or otherwise to promote the     *
27 * sale, use or other dealings in this Software without prior written       *
28 * authorization.                                                           *
29 ****************************************************************************/
30
31/****************************************************************************
32 *   Author:  Juergen Pfeifer, 1995,1997                                    *
33 ****************************************************************************/
34
35#include "form.priv.h"
36
37MODULE_ID("$Id: fld_max.c,v 1.7 2023/10/17 09:52:10 nicm Exp $")
38
39/*---------------------------------------------------------------------------
40|   Facility      :  libnform
41|   Function      :  int set_max_field(FIELD *field, int maxgrow)
42|
43|   Description   :  Set the maximum growth for a dynamic field. If maxgrow=0
44|                    the field may grow to any possible size.
45|
46|   Return Values :  E_OK           - success
47|                    E_BAD_ARGUMENT - invalid argument
48+--------------------------------------------------------------------------*/
49FORM_EXPORT(int)
50set_max_field(FIELD *field, int maxgrow)
51{
52  T((T_CALLED("set_max_field(%p,%d)"), (void *)field, maxgrow));
53
54  if (!field || (maxgrow < 0))
55    RETURN(E_BAD_ARGUMENT);
56  else
57    {
58      bool single_line_field = Single_Line_Field(field);
59
60      if (maxgrow > 0)
61	{
62	  if (((single_line_field && (maxgrow < field->dcols)) ||
63	       (!single_line_field && (maxgrow < field->drows))) &&
64	      !Field_Has_Option(field, O_INPUT_LIMIT))
65	    RETURN(E_BAD_ARGUMENT);
66	}
67      field->maxgrow = maxgrow;
68      /* shrink */
69      if (maxgrow > 0 && Field_Has_Option(field, O_INPUT_LIMIT) &&
70	  field->dcols > maxgrow)
71	field->dcols = maxgrow;
72      ClrStatus(field, _MAY_GROW);
73      if (!((unsigned)field->opts & O_STATIC))
74	{
75	  if ((maxgrow == 0) ||
76	      (single_line_field && (field->dcols < maxgrow)) ||
77	      (!single_line_field && (field->drows < maxgrow)))
78	    SetStatus(field, _MAY_GROW);
79	}
80    }
81  RETURN(E_OK);
82}
83
84/* fld_max.c ends here */
85